Abstract:

Coral recruitment is a process where juvenile coral, generated through
reproduction, attached to substrates and grow to become part of coral
populations. Mineral accretion defined as a process of formation of solid minerals
and is one method for forming artificial reefs by using the principle of
calcification, this method is known as biorock. Biorock expected to be a substrate
for coral larvae settlement, so it can be used as one of the innovations of
rehabilitation of coral reefs that were damaged. Observation of coral and other
benthic organism recruitment were carried out once in a month during April to
October 2010. In general algal and ascidians dominated unit with biorock
treatment at the first month of observation. At the end of observation, we found
ten coral genera from six families at biorock. We observed an increase of coral
genera as much as three fold during T0-T6; Pavona, Millepora and Stylophora.
However coral species increment did not occur in non-biorock treatment, there
were only six genera and three families observed through out the study period.
The highest coral recruitment density was found at biorock treatment (45
colonies/unit) compare to non biorock (33 colony/unit).